"worth the money" is relevant to your use. For whitetail hunting, bird hunting, or anything where you are just sitting there; no. Same if you are going back to a warm house where you can dry everything out every night or if you are hunting somewhere that if you get a little wet and cold you can get out easily. Just go buy cotton long johns from wal mart and save yourself a ton a money. But if you just like the feel of merino in every day life and on hunting trips and you got the money, then go for it.
For extended backpack trips, yes it's absolutely worth the money. Dries quick, it's light, and it can take an alder beating. My favorite item that I think only they make is the 3/4 base layer pant with the side-zip. They are zip off which is awesome because I alway start the day cold. After a mile you can easily zip them off and put them back on quickly if you're stopped glassing. I used to just keep wearing base layers and sweating them out because I didn't want to stop and then everything would be drenched.
I no longer do any trip without a set of puffy pant/jacket. MVP every trip. But those can be bought cheaper at several mountaineering places. Just make sure the bottoms side-zip off and decide if you need down or synthetic based on your typical hunt conditions. They have solid rain gear that is with the best of them if you are hunting that kind of terrain and that kind of hunt. But again, unless I'm doing a goat or sheep hunt where weight is extremely important, I just run Helley Hansen. Nothing else of theirs really sticks out as the best in class. I'll take a FjallRaven pant, OR Gaiter, Black Ovis upper base, and Sitka hoodie before Kuiu. All but the hoodie are a better price.